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Why is it a good idea to inspect all chimneys built before 1940?

April 26, 2017built chimneys good IDEA inspect

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Why is it a good idea to inspect all chimneys built before 1940?

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Chimney design changed after the Long Beach earthquake. Prior to 1939 most chimneys were not reinforced, had ash mortar and many were not lined. A single width ash mortar chimney can be a real safety hazard and must be carefully looked at.